Skiving-machine



P. R. GLASS.

SKIVING MACHINE.

APPLICATION FILED FEB. 13. I919.

outrun STATE s PATE PERLEY IR. GLASEL OIE BlROOKLIN'E, IlIASSACHUSJFlTTfl, ASlQIGl TUH, T0 UNITED SHOE MACHINERY CORPORATION, IPATERSON, NEW JERSEY, A CORPORATION UF NEW JERSEY. r

sirrvrne-iuacnrn'n.

Patented Dec. 13, 1%21.

Application filed February 13, 1919. Serial No. 2%,850.

To allwiaomz'tmay concern:

Be it known that I, Pannier R. Games, a citizen of the United States, residing at Brookline, in the county of Norfolk and State of Massachusetts, have invented certain Improvements in Skiving-ltfachines, of

which the following description, inconnec tion with the accompanying drawings, is a sliieciflcation, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to leather working.

. machines and is herein illustrated as em bodied in a machine of the hmazeen type for skiving the margin of piece of upper leathe in the manufacture of boots and shoes it is customary to skive certain portions of the margins of tips, vamps, quarters and ether parts of the upper. in some instances the margin is skived down toa thin edge preparatory to folding itg in others, the angle of the skive is slight, the purpose being merely to smooth the margin on the flesh side. In the latter case, no folding isdone,

the raw edge being finished by applying stain to it. i

The knife of a skiving machine is ordinarily rotated in such a directionwith re spect to the work being operated upon that the operative portion. of the edgeof the knife at any given instant is moving from the body of the Work toward and over the edge thereof. In such case,.the knife exerts a wiping action outwardly with respect to the edge, and with certain kinds of work produces a more or less fuzzy or ragged edge due, for .eX- ample, to projecting fibers of leather. If the skived margin is subsequently to be folded a fuzzy edge of'this kind is immaterial since it. will not show in the finished work; but if a raw stained edge is to be produced, its appearance willbe. marred. lnorder to preventlthe formation ofra fuzzy edge, Where a raw, stained edge isthe final result sought, it has been customary to r rotation of the knife causes the loose ends of the fibers of the work to be wiped back over the body portion so that aclean cut edge is produced. Changing the path of the rectly by a belt from a driving shaft, the

direction of rotation of which may be reversed at any time. The roll is driven indirectly from the driving shaft through suitable mechanism constructed and arranged to maintain the direction of rotation of the roll unchanged irrespective of the direction of rotation of the driving shaft. With this construction the operator may at any timereverse the direction of rotation of the driving shaft and thereby of the knife without changing the direction of rotation of the feedroll, so that whereas formerly it was necessary to stop the machine and make a change in the driving mechanism in order to reverse the direction of rotation of the knife without changing the operation of the feed roll, it is possible to accomplish the same result with the present machine by merely manipulating a belt shifter. to change the direction of rotation of the driving shaft.

This and other features of the invention, including certain details of construction and combinations of parts, will be described as embodied in an illustrative machine and pointed outin the appended claims.

Referring now to the accompanying draw- 1ngs,-

Figure l isa front elevation, with certain parts in section, of a machine in which the present invention is embodied, and

Fig.2 is a perspective showing the mounting of the feed roll.

The machine is of the Amazeen type and comprises a rotary disk knife 3, a rotary feed roll. 5, and a rotary feed disk'l', these parts being adapted to operate as usual in this type of machine. The knife is mounted in hearings in an overhanging arm which is part of the frame 9 of the machine, the upper end of the knife shaft 11 extending into a bearing 13 and the lower end extending through the stationary sleeve 15 which is mounted in the end of the arm 9. The

a pulley 17 fast to the knife shaft is located between the upper end of the sleeve 15 and a nut 19 which is threaded on the shaft 11. VViththi construction it will be noted that the knife shaft has no adjustment. The knife is driven by a belt 21 which passes around the pulley 17, over a small pulley 23 the axis of which is fixed, around a large pulley 25 which is fast to a driving shaft 27, and back over a small pulley 29 rotatably mounted in an arm 31 which is pivoted to the frame of the machine at 33. This arm has rotatably mounted at its lower portion a roller 35 which is adapted to be engaged by a cam 37 formed on the end of a lever 39 which is pivoted to the machine at 41 and may be rocked about its pivot by exerting a downward pull upon a treadle rod 43. A'treadle, not shown, is connected to the rod,

and a spring, also not shown, acts upon the treadle soas normally to raise the treadle rod and maintain the lever 39 in the position shown. When, however, the treadle is depressed and the arm 39 rocks in a counter clockwise direction about its pivot, the cam 37 engages the roll 35 to swing the arm 31 about its pivot 33 and thereby raisethe small,

pulley 29 so as to tighten the belt 21. Fast to'the shaft 27 is a pulley 4:5, and located one'on each side of this pulley are two loose pulleys 17, 4C9. The fast pulley d5 may be driven either by a crossed belt 51 or, as shown,by an open belt 53,these belts being driven from the usual counter shaft, not shown, located beneath the bench upon which the'machine rests. A belt shifter55 'having a handle 57 is slidableon a square rod 59. With the position of the parts shown,

. the pulley 15, and consequently the shaft 27,

is being rotated in a given direction by the open belt 53. If now'the belt shifter is moved to the right, the open belt '53 will be transferred to the loose pulley 49 and the crossed .belt 51 will drive the pulley 4:5, and

. consequently the shaft 27, in the opposite I direction.

It will thus'be clear that at any time the two belts may be shifted to reverse the direction of rotation of the knife 3.

In order to insure that the direction of rotation of the feed roll shall remain the same irrespective of the direction of rotation of theknife, the following construction is employed". A counter shaft 61 rotatably and slidably mounted in hearings in the frame of the machine has mounted upon it a gear 63 which meshes with aworm 65 formed upon the shaft of the small pulley 23. The gear 63 is connected with the shaft 61 by means'of a screw 66 the lower end of which extends into a diagonal groove 67 in the shaft 61. This groove extendsonly part way around the shaft so that the lower end of the screw 66 contacts with one end or '71 and around another groove in the double pulley 75. The hub of the pulley 69 has mounted in its end a pin 81, and the pulley 71 has mounted in it a similar pin 83. Driven through the shaft 61 is a pin 35 which is adapted to cooperate alternately with the pins 81 and 83 and thereby to impart rotation either to the pulley 69 or to the pulley 71. With the parts in the position shown, the shaft 61 is in its right-hand position and is rotating in the direction indicated by the arrow. The pin 35 is in contact with the pin 81; and consequently the pulley 69 is being rotated and through the belt 73 is rotating the pulley in the same direction that the counter shaft (51 is rotat ing. If now, the belt shifter 55 is manipulated to reverse the direction of rotation of the driving shaft 27, the direction of rotation of the gear 63 will be reversed. This will cause the end of the screw 66 to travel in the oblique slot 67 and move the shaft 61 to the left, thereby disengaging the pin 85 from the pin 81 and causing it to engage the pin 83. The power will now be applied from the shaft 61 to the pulley 71. hi this case, the shaft 61 will be rotating in. the di-- rection opposite to that indicated by the arrow; but because of the crossed belt 79. the direction of rotation of the pulley 7 5 will remain unchanged. As will presently appear, the direction of rotation of the pulley 75 determines the direction of rotation of V the feed roll 5.

The shaft 77 is connected by a universal joint 87 with one end of a floating shaft 89 the other end of which is connected by a similar universal joint 91 with a shaft 93 to which the feed roll 5 is fastened. ..s shown in Fig. 1', the shaft 93 has a reduced portion at its end which extends through a bore in a partition in the interior of the roll and has threaded on its end nuts 95 so that the roll is rigid with the shaft 93. The bearing 97 for the shaft 93 is pivoted at 99 to the outer end of an arm 101 and has on its under side a projection which fits in a groove formed in the arm 101 so as to insure that the tipping of the bearing 97 about the pivot 99 shall take place in a vertical direction without side play. In order to adjust the bearlng and consequently the roll about the pivot 99 so as to vary the angle of the shire, the bearing has an extension provided with a square slot 103 in which fits a block 105 loosely mounted on a small crank pin 197 whlch is carried by a disk 109. The disk is fast to one end of a shaft having a bearing in the arm 101 and provided at its opposite end with a head 111 having a scale marked thereon, any one of the divisions of which may be brought into register with a mark on the bearing. A handle 113 is provided for making this adjustment; and a spring washer 114 is provided to hold the parts in adjusted position. The arm 101 is pivoted at 115 between upstanding ears on a support 117 and is adjustable about said pivot by means of a thumb nut 119. This thumb nut is mounted between the arms of a yoke formed at the endof the support 117 and is threaded to receive a screw 121, said screw being held from turning by a pin 123 which enters a slot in the screw, not shown. The arm 101 is guided in its movement about the pivot 115 by cars formed upon the support 117 one of which is shown at 125. The pivot 115 is located at a sufficient distance from the roll 5 so that when the arm 101 is swung about the pivot, the movement of the roll is approximately vertical, the purpose of this adjustment being to provide for different thicknesses of stock. In order to permit the roll to be adjusted toward and from the knife in the line of feed, the support 117 is pivotally fastened to the frame of the machine by a bolt 127; and the support may be swung about the axis of this bolt by turning a thumb nut 129, said thumb nut being fast to a screw which is held from longitudinal movement with respect to the frame of the machine and threaded into a depending lug on the support. A presser foot and gage, indicated as a whole by the numeral 131, is mounted on the arm 101. This presser foot and gage is, or may be, substantially the same as that shown in the patent to Alexander No. 1,180,222 and will not be further described.

As has been explained, the double grooved pulley 7 5 is loose on the shaft 77. In order to clutch it to the shaft when desired a cap 133 is slidably keyed on the shaft and is adapted to be moved by means of a lever 135 which, like the lever 39, is pivoted at 4.1 to the frame of the machine. This lever has a depending portion 137, rectangular in cross section, which is adapted to be engaged by the lower face of the lever 39 when the treadle rod 43 is given a downward pull. It should be noted, however, that the first effect of a downward pull upon the treadle rod 13 is to cause the cam 37 to engage the roll 35 and thereby, by tightening the belt 21, to apply power to the knife 3. Further downward movement of the lever 39 causes it to engage the depending portion 13?- so as to rock the lever 135 and thereby clutch the pulley 75 to the shaft 77 and apply power to the feed roll. It should be noted that by varying the force of the downward pull upon the rod 43, more or less of a sllp may be permitted between the end of the pulley 75 and the adjacent end of the cap 133 so as to vary the rate of rotation of the feed roll. Such a construction is desirable particularly when a piece of work, a portion of the edge of which is sharply curved, is being operated upon since, when the sharply curved edge isencountered, it is desirable to decrease the rate of feed.

The stem of the feed disk 7 is mounted in bearings in a bracket 139 which is carried by the arm 101 so that the feed disk partakes of all the adjustments of said arm. A. spring 141, the tension of which may be varied by turning a screw 143, engages the top of the spindle of the feed disk so as to hold it yieldingly against the work. A. grinder 145 of the usual type is provided, said grinder being driven in the usual manner by means of a belt 147.

In .the use of the machine, power is ap plied continually to the belts 51 and 53. With the parts in the positions shown, the belt 21 is loose and consequently power is being applied only to the driven shaft 27.

epression of the treadle first applies power to the knife. to rotate it and then applies power to the feed roll. If at any time the operator desires to reverse the direction of rotation of the knife, he has merely to manipulate the handle 57 of the belt shifter. It is thus possible to reverse the direction of rotation of the knife at any time during the running of the machine without changing the direction of rotation of the feed roll.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A machine of the class described, having in combination, a tool, means for driving the tool in a given manner and at a given speed, feed mechanism, means for operating said mechanism to advance the work to the tool, and. means capable of being manipulated by the operator during the running of the machine for changing the manner in which the tool is driven while maintaining the velocity of the tool and the operation of the feed mechanism unchanged.

2. A machine of the class described, having in combination, a tool, means for driv ing the tool in a given direction, feed mechanism, means for operating said mechanism to advance the work to the tool, and means capable of being manipulated during the running of the machine for reversing the direction in which the tool is driven while maintaining the operation of the feed mechanism unchanged.

. 3. A machine of the class described, having in combination, a knife, means for driving the knife in a given direction, feed mechanism, means for actuating said mechanism to advance the work to the knife, and means under the control of the operator during the running of the machine for reversing the direction in which the knife is driven while maintaining the direction of feed of the work unchanged. 7

a. A machine of the class described, having in combination, a knife, a feed roll, a driving shaft, means for driving the shaft, means for driving the knife and the roll from the shaft, and means for reversing the direction of rotation of the shaft and thereby of the knife while-maintaining the direction of rotation of the feed roll unchanged.

5. A machine of the class described, having in combination, a rotary knife, a rotary feed roll, and means whereby the direction of rotation of the knife may be reversed during the running of the machine while maintaining the direction of rotation of the feed roll unchanged.

6. A machine of the'class described, having in combination, a knife, a feed roll, a driving shaft, a counter-shaft, means for driving the knife directly from the driving shaft, means for driving the roll through the counter-shaft, and means for reversing the direction Or rotation of the driving shaft and thereby of the knife" and counter-shaft while maintaining the direction of rotation of the roll unchanged.

7. A machine of the class described, having in combination, a tool, means for feeding work to the tool, a driving shaft, a counter-she t, means for rotating the counter shaft from the driving shaft, a feed shaft, two pulleys fastto the feed shaft, two pulleys loosely 'mounted on the countershaft and adapted to vbe connected with it alternately, means connecting one of the pulleys on thecounter-shaft with one of the pulleys on the feed shaft constructed and arranged to compelfthe two pulleys to rotate in thesamedirection, means connecting the other pulley on the counter-shaft with the other-pulley on the feed shaft constructed arranged to compel the two pulleys to rotate in opposite directions, and means whereby reversing the direction of rotation of the driving shaft frees one of the countershaft pull ys from driving connection with the counter-shaft and connects the other one with it.

'8.A n1achine of the class described, having in combination, arotary diskknife, a feed roll, means whereby the roll may be adjusted toward and from the plane of the 'cut of the knife means whereb the roll may be adjusted substantially parallel to said eut, and means whereby the inclination of the axis of the roll may be varied.

9.-A machine of the class described, having in combination, a rotary disk knife, a.

feed roll, means whereby the roll may be adjusted substantially vertically toward and from the knife, means whereby the roll may be adjusted substantially horizontally toward and from the knife, and means whereby the inclination of the axis of the roll may be varied.

10. A machine of the class described, having in combination, a knife, :1 roll for advancing the work to the knife, a shaft to which the roll is fast, a bearing for the roll shaft, an arm to which the bearing is pivoted, a support to which the arm is pivoted, and means whereby the support may be adjusted to adjust the feed roll toward and from the knife substantially in the line of feed of the work.

11. A machine of the class described, having in combination, a knife, a roll for adancing the work to the knife, a shaft to which the roll is fast, a bearing for the roll shaft, an arm to which the bearing is pivoted, means whereby the bearing may be adjusted with respect to the arm, a support to which the arm is pivoted, and means whereby the support may be adjusted to adjust the feed roll toward and from the knife substantially in the line of feed of the work.

12. A machine of the class described, having in combination, a knife, a roll for advancing the work to the knife, a shaft to which the roll is fast, a bearing for the roll shaft, an arm to which the bearing is pivoted, a support to which the a r-m is pivoted, means whereby the arm may be adjusted with respect to the support, and means whereby the support may be adjusted to adjust the feed roll toward andfrom the knife substantially in the line of feed of the work.

13. The combination with a driving shaft and a driven shaft, of a counter-shaft, means for rotating the counter-shaft from the driving shaft, means for rotating the driven shaft from the counter-shaft, and inc-ans for reversing the direction of rotation of the driving shaft and thereby of the countershaft while maintaining unchanged the direction of rotation of the driven shaft.

1 A machine of the class described, having in combination, a frame having an overhanging arm, a rotary knife shaft mounted in said arm and held from movement in any manner other than rotary, a disk knife fast to the lower end of the shaft, a feed roll located beneath the knife, and means whereby the feed roll may be adjusted both angularly and toward and from the knife.

In testimony whereof I have signed my name to this specification.

PERLEY R. GLASS. 

